Method of making swingletrees or draft members.



D. M. SMITH. METHOD 0F MAKING SWINGLBTREBS 0R DRAFT MEMBERS.

APPLIGATION FILED FEB.12, 1912.

1,049,160, Patented Deo. 31, 1912.

r l lll/ll/l//I//f//l//f//l//l/l/f/I//f/f//IIIIII///IIII/IIIIII/IIIIIIIIIIIIIIIIIIA WITNESSES INVENTOR UNITEDSTATES PATENT OFFICE.

DAVID M. SMITH, 0F SEWICKLEY, PENNSYLVANIA, ASSIGNOR T0 DIAMOND FORGING& MANUFACTURING- COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORA- TION0F PENNSYLVANIA.

Specification of Letters Patent.

Patented Dec. 31, 1912.

Application led February 12, 1912. Serial No. 677,084.

To all whom it may concern:

Be it known that I, DAviD M. SMITH, of Sewickley, Allegheny county,Pennsylvania, have invented a new and useful Improvement in Methods ofMaking Swingletrees or Draft Members, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification, in which- Figure l is aplan view of one form of my improved draft member; Fig. 2 is a sectionalview of one port-ion of the draft member showing the first step in themethod of making the same; Fig. 3 is a similar view in which I haveshown the next step in the method of making the same; and Fig. 4 is atransverse section of Fig. l.

My invention relates to swingletrees or draft members, and the method ofmaking the same.

The object of my invention is to produce a cheap and eiiicient device inwhich the hook members or connecting devices at the ends thereof areformed integrally with the tubular body of a metallic draft member. Theprecise nature of my invention will be best understood by reference tothe accompanying drawings, which will now be described, it beingpremised, however, that vario-us changes may be made in the details o-flconstruction and the method of making the same, without departing fromthe spirit and scope of my invention as defined in the appended claims.Y

In the drawings, the numeral 2 designates a tubular draft member, havingconnected to the cent-ral portion thereof an eye 3 for connecting thedraft member to the object to which power is to be applied, and whichmay be connected to the draft member in any desired manner.

Formed integrally with the draft member and at the ends thereof are thehooks 4 which are bent upon themselves to retain the rings on the draftchains in position within the hooks. y

In producing this article, I first take a piece of tubing and swage theends to taper the same in the manner shown in Fig. 2. I then furtherswage the eXtreme end portion thereof to form a solid extension on theends of the member 2, as clearly shown in Fig. 2. I then taper the outerends of these projections, and bend them upon themselves to form hooksas shown at 4: in Fig. 1. The closing up of the tubes at its ends tofor-m the solid extensions forms abrupt offsets at 5, which serve asstops for the rings on the traces or draft chains which are connected tothe hooks 4.

The advantages of my invention result from the provision of aswingletree or draft member formed from a piece of tubing, and in whichsolid hooks are formed integrally on the ends of said draft members.

I claim l. The method of making metallic tubular draft members,consisting in tapering the end of a tubular blank, then swaging down thetapered portion into a solid ektension, and bending said extension intohook form, substantially as described.

2. The method of making metallic tubular draft members, consisting intapering the end of a tubular blank, then swaging down the taperedportio-n into a solid extension, with an abrupt shoulder between it andthe draft member, and bending said extension into hook form,substantially as described.

In testimony whereof, I have hereunto set my hand.

D. M. SMITH.

Witnesses:

Jnssn B. HELLER, H. M. Corwin.

Gop'ies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

